Gravitational waves (GWs) were recently detected for the first time. This revolutionary
discovery opens a new way of learning about particle physics through GWs from first-order …

Particle physics today faces the challenge of explaining the mystery of dark matter, the origin
of matter over anti-matter in the Universe, the origin of the neutrino masses, the apparent …

Abstract The Einstein Telescope (ET), the European project for a third-generation
gravitational-wave detector, has a reference configuration based on a triangular shape …

Massive black holes (MBHs) inhabit galactic centres, and power luminous quasars and
active galactic nuclei, sha** their cosmic environment with the energy they produce. The …

The current cosmological model requires new physics beyond the standard model of
elementary particles and fields, such as dark matter and dark energy. Their nature is …

We discuss equivalent representations of gravity in the framework of metric-affine
geometries pointing out basic concepts from where these theories stem out. In particular, we …

GW190521 is a short-duration, low-frequency gravitational-wave signal in the LIGO-Virgo
catalogue. The signal is consistent with the ringdown and possibly some of the inspiral …

Gravitational-wave observations of black hole ringdowns are commonly used to characterize
binary merger remnants and to test general relativity. These analyses assume linear black …

The interaction of binary black hole mergers with their environments can be studied using
numerical relativity simulations. These start only a short finite time before merger, at which …

Tidal interactions play a crucial role in deciphering gravitational wave signals emitted by the
coalescence of binary systems. They are usually quantified by a set of complex coefficients …